"echoping" is a small program to test (approximatively) performances of a
remote host by sending it TCP "echo" (or other protocol) packets.

SmokePing is a network latency monitor which works in a way that is similar to
MRTG. It measures network latency to a configurable set of destinations on the
network, and displays its findings in easy-to-read Web pages. SmokePing has
special support for monitoring hosts with dynamic IP addresses. SmokePing uses
RRDtool as its logging and graphing back-end, making the system very efficient.
The presentation of the data on the Web is done through a CGI which creates
graphs on demand.